Petunias and potatoes may actually be carnivorous plants, scientists now suggest. Indeed, carnivorous behavior may be far more widespread in plants than commonly thought - if we take a closer look, botanists said. At least six different kinds of killer plants have been recognized since the time of Darwin, such as Venus flytraps, which snares insects between its jaw-like leaves, and pitcher plants, which capture victims in slippery pits. These plants apparently target animals to supplement their growth in harsh, nutrient-poor habitats. Many other plants, some quite common, have also been suggested as potential carnivores over the years that have...